Operation Roaring Lion / Operation Epic Fury

Following the joint strikes by Israel and the United States against the Iranian regime on February 28, questions have quickly emerged about the legality of such action under international law.

In reality, international law recognizes the inherent right of states to defend themselves against imminent threats. This explainer outlines the key legal principles—including jus ad bellum, Article 51 of the UN Charter, and customary international law—that help clarify the legal basis for self-defense in the face of ongoing aggression.